49ers left tackle Joe Staley injures knee, out

49ers left tackle Joe Staley injured his right knee early in

Sunday’s game against St. Louis and didn’t return.

St. Louis left tackle Jake Long then went down late in the third

quarter and was being examined for a head injury after being hit by

teammate Zac Stacy.

Staley was hurt at the 11:13 mark of the first quarter when he

landed awkwardly while grabbing his knee. Staley stayed on the

ground for several minutes before walking off the field on his own.

Trainers and medical staff examined Staley on the bench then he

headed to the locker room. The team says he’s done for the day.

Alex Boone moved into Staley’s spot and Joe Looney came in after

making his NFL debut Monday. San Francisco tight end Vance McDonald

injured an ankle.

AP NFL website: www.pro32.ap.org